CN102028996A - Method and device for regulating output pressure of respirator decompressor - Google Patents

Method and device for regulating output pressure of respirator decompressor Download PDF

Info

Publication number
CN102028996A
CN102028996A CN2009102356344A CN200910235634A CN102028996A CN 102028996 A CN102028996 A CN 102028996A CN 2009102356344 A CN2009102356344 A CN 2009102356344A CN 200910235634 A CN200910235634 A CN 200910235634A CN 102028996 A CN102028996 A CN 102028996A
Authority
CN
China
Prior art keywords
output pressure
pressure
respirator
value
decompressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2009102356344A
Other languages
Chinese (zh)
Other versions
CN102028996B (en
Inventor
李敬辉
李治
张广林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Aeonmed Co Ltd
Original Assignee
Beijing Aeonmed Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Aeonmed Co Ltd filed Critical Beijing Aeonmed Co Ltd
Priority to CN 200910235634 priority Critical patent/CN102028996B/en
Publication of CN102028996A publication Critical patent/CN102028996A/en
Application granted granted Critical
Publication of CN102028996B publication Critical patent/CN102028996B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Respiratory Apparatuses And Protective Means (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

The invention provides a method for regulating the output pressure of a respirator decompressor, comprising the following steps of: setting the target value of the output pressure of the respirator decompressor; taking the difference of the target value and the measured practical value of the output pressure as a pressure bias value; and regulating output voltage according to the pressure bias value. The invention also provides a device for regulating the output pressure of the respirator decompressor, comprising a setting module, a calculation module and a regulation module, wherein the setting module is used for setting the target value of the output pressure of the respirator decompressor; the calculation module is used for taking the difference of the target value and the measured practical value of the output pressure as the pressure bias value; and the regulation module is used for regulating the output pressure according to the pressure bias value. The output pressure of the respirator decompressor can be regulated within certain range by the invention so as to satisfy the requirements of different applications.

Description

The control method of the output pressure of respirator decompressor and device
Technical field
The present invention relates to medical instruments field, in particular to a kind of control method and device of output pressure of respirator decompressor.
Background technology
In the product design of pneumatic electronic control type respirator, often needing to use air relief valve provides stable operating pressure, and air-path control system can be realized comparatively accurate flow-control according to this pressure.
At present, comparatively common pressure control scheme is to adopt the air relief valve output fixation pressure of mechanical adjustment (people manually regulates) in advance, and adjustment process need be used special equipment, in case set up, this output pressure is just immutable in theory.Because the air flow rate FLOW=pressure P/adjustable resistance R of respirator control, when the output pressure P of air relief valve was constant, the range of accommodation of air flow rate FLOW was by the range of accommodation decision of resistance R, but often the range of accommodation of R is limited.If want to realize large-scale Flow-rate adjustment, depend merely on fixed output pressure P and be difficult to reach.
The inventor finds that there are the following problems at least in the prior art: the output pressure of existing respirator decompressor is fixed, can't regulate according to the duty of system.
Summary of the invention
The present invention aims to provide a kind of control method and device of output pressure of respirator decompressor, and the output pressure that can solve existing respirator decompressor is fixed, the problem that can't regulate according to the duty of system.
In an embodiment of the present invention, provide a kind of control method of output pressure of respirator decompressor, having comprised: the desired value of setting the output pressure of respirator decompressor; With the difference of desired value and the actual value of the output pressure that records as the pressure divergence value; Regulate output pressure according to the pressure divergence value.
Preferably, desired value is to preestablish or set by the duty of analyzing respirator.
Preferably, regulating output pressure according to the pressure divergence value specifically comprises: whether the error of judging the pressure divergence value is in ± 2% scope; If not, then regulating output pressure is:
Figure B2009102356344D0000021
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K PBe proportionality coefficient, T IBe integration time constant, T DBe derivative time constant.
Preferably, output pressure is 20KPa～250KPa.
In an embodiment of the present invention, also provide a kind of adjusting device of output pressure of respirator decompressor, having comprised: setting module is used to set the desired value of the output pressure of respirator decompressor; Computing module is used for difference with desired value and the actual value of the output pressure that records as the pressure divergence value; Adjustment module is used for regulating output pressure according to the pressure divergence value.
Preferably, desired value is to preestablish or set by the duty of analyzing respirator.
Preferably, adjustment module is regulated output pressure according to the pressure divergence value and specifically comprised: whether the error of judging the pressure divergence value is in ± 2% scope; If not, then regulating output pressure is:
Figure B2009102356344D0000031
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K PBe proportionality coefficient, T IBe integration time constant, T DBe derivative time constant.
Preferably, output pressure is 20KPa～250KPa.
Because utilizing the desired value of output pressure of respirator decompressor and the deviation between the actual value regulates output pressure, the output pressure that has solved existing respirator decompressor is fixed, the problem that can't regulate according to the duty of system, thereby can make the output pressure of respirator decompressor regulate within the specific limits, satisfy needs of different applications.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the flow chart according to the control method of the output pressure of the respirator decompressor of the embodiment of the invention;
Fig. 2 has gone out the sketch map according to the adjusting device of the output pressure of the respirator decompressor of the embodiment of the invention;
Fig. 3 shows the structural representation of respirator decompressor according to the preferred embodiment of the invention;
Fig. 4 shows the flow chart of the control method of the output pressure of respirator decompressor according to the preferred embodiment of the invention.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the flow chart according to the control method of the output pressure of the respirator decompressor of the embodiment of the invention, may further comprise the steps:
Step S10, the desired value of the output pressure of setting respirator decompressor;
Step S20, with the difference of the desired value of output pressure and the actual value of the output pressure that records as the pressure divergence value;
Step S30 regulates output pressure according to the pressure divergence value.
This embodiment utilizes the desired value of output pressure of respirator decompressor and the deviation between the actual value that output pressure is regulated, the output pressure that has solved existing respirator decompressor is fixed, the problem that can't regulate according to the duty of system, thereby can make the output pressure of respirator decompressor regulate within the specific limits, satisfy needs of different applications.
Preferably, the desired value of output pressure is to preestablish or set by the duty of analyzing respirator.For example set the desired value of the output pressure of respirator decompressor, can satisfy the different demands of practical clinical like this by the type of analyzing the patient, patient's situation etc.
Preferably, step S30 specifically comprises: whether the error of judging the pressure divergence value is in ± 2% scope; If not, then regulating output pressure is:
Figure B2009102356344D0000051
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K PBe proportionality coefficient, T IBe integration time constant, T DBe derivative time constant.
The preferred embodiment provides the specific embodiments of regulating output pressure according to the desired value of the output pressure of respirator decompressor and actual value according to pid control algorithm.In actual applications, the range of error of setting pressure deviate is ± 2%, when judging the pressure divergence value in this scope the time, thinks that then current output pressure meets the requirements; When judging the pressure divergence value outside this scope the time, think that then current output pressure is undesirable, need regulate according to above-mentioned algorithm output pressure.
Preferably, the output pressure of respirator decompressor can be adjusted in 20KPa～250KPa scope.
Above preferred embodiment can be applicable in the pressure control of respirator, anesthetic machine, can provide adjustable pressure control device for respirator, anesthetic machine, implementation method is simple, control is reliable, with low cost, can obviously improve the flow-control effect of respirator, anesthetic machine.
Fig. 2 has gone out the sketch map according to the adjusting device of the output pressure of the respirator decompressor of the embodiment of the invention, and this device comprises: setting module 10 is used to set the desired value of the output pressure of respirator decompressor; Computing module 20 is used for difference with the desired value of output pressure and the actual value of the output pressure of the respirator decompressor that records as the pressure divergence value; Adjustment module 30 is used for regulating output pressure according to the pressure divergence value.
This embodiment utilizes the desired value of output pressure of respirator decompressor and the deviation between the actual value that output pressure is regulated, the output pressure that has solved existing respirator decompressor is fixed, the problem that can't regulate according to the duty of system, thereby can make the output pressure of respirator decompressor regulate within the specific limits, satisfy needs of different applications.
Preferably, the desired value of output pressure is to preestablish or set by the duty of analyzing respirator.For example set the desired value of the output pressure of respirator decompressor, can satisfy the different demands of practical clinical like this by the type of analyzing the patient, patient's situation etc.
Preferably, adjustment module 30 is regulated output pressure according to the pressure divergence value and specifically comprised: whether the error of judging the pressure divergence value is in ± 2% scope; If not, then regulating output pressure is:
Figure B2009102356344D0000061
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K PBe proportionality coefficient, T IBe integration time constant, T DBe derivative time constant.
The specific embodiments that the preferred embodiment provides adjustment module 30 to regulate output pressure according to pid control algorithm according to the desired value and the actual value of the output pressure of respirator decompressor.In actual applications, the range of error of setting pressure deviate is ± 2%, when judging the pressure divergence value in this scope the time, thinks that then current output pressure meets the requirements; When judging the pressure divergence value outside this scope the time, think that then current output pressure is undesirable, need regulate according to above-mentioned algorithm output pressure.
Preferably, the output pressure of respirator decompressor can be adjusted in 20KPa～250KPa scope.
Fig. 3 shows the structural representation of respirator decompressor according to the preferred embodiment of the invention, and this respirator decompressor comprises: source of the gas 1, air relief valve 2, motor 3, pressure transducer 4, electric machine controller 5 and shaft joint 6.
Wherein, source of the gas 1 is the power source of pneumatic electronic control type respirator, is generally air or oxygen;
Air relief valve 2 is an adjustable type, and its output pressure is lower than input pressure (being bleed pressure), has the swing handle of an adjustable pressure;
Motor 3 can be selected the small-sized or micromachine that moment of torsion is little, response is fast, position control accuracy is high for use, and motor 3 is regulated the position angle of the adjusting rod of air relief valve 2 by shaft joint 6, thereby regulates output pressure;
Pressure transducer 4 is responsible for the output pressure of feedback reduced pressure device, and monitoring range is wide, and respirator uses and generally measures in the scope of 0～40PSIG and can meet the demands, and should select the product that response is fast, sluggishness is little, precision is high for use;
Electric machine controller 5 carries out computing according to the actual value of the output pressure of pressure transducer 4 feedbacks, and drives, controls motor 3 adjusting positions according to pid control algorithm.The PID control system is a kind of linear control system, and controlled pressure deviate e (t) is the poor of the desired value of output pressure and actual value:
e(t)＝r(t)-y(t) (1)
Pid control algorithm is: u ( t ) = K P ( e ( t ) + 1 T I ∫ 0 t e ( t ) dt + T D de ( t ) dt ) - - - ( 2 )
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K PBe proportionality coefficient, T IBe integration time constant, T DBe derivative time constant.
Shaft joint 6 connects motor 3 and air relief valve 2.
And wherein the desired value of output pressure is set in the host computer of respirator.In the preferred embodiment, host computer plays the function of above-mentioned setting module 10, and electric machine controller 5, motor 3 and shaft joint 6 play the function of computing module 20 and adjustment module 30 jointly.
The idiographic flow (as shown in Figure 4) of the control method of output pressure is described below in conjunction with respirator decompressor as shown in Figure 3:
Step S102, the desired value of setting output pressure in host computer.
Step S104, electric machine controller obtains the desired value of output pressure according to host computer instruction, and wherein desired value is carried in the host computer instruction.
Step S106, electric machine controller judges according to the actual value of the output pressure of pressure transducer feedback whether current pressure control meets the requirements, if then withdraw from flow process.In actual applications, can be set at error as pressure divergence value e (t) in ± 2% scope the time, meet the requirements.
Step S108 if not, then adjusts motor position according to pressure divergence value e (t) according to above-mentioned formula (2), output pressure is met the requirements, and change step S106 over to.
The output pressure of existing respirator decompressor is fixed as 250KPa or 160KPa, and output pressure can be adjusted in 20KPa～250KPa scope after using above preferred embodiment, thereby can satisfy needs of different applications.The preferred embodiment can protect the patient to use the safety of respirator, and the method for avoiding single failure is provided.In the application of comprehensive respirators such as adult, baby, anesthetic machine, can satisfy the different demands of practical clinical better.
From above description, as can be seen, the above embodiments of the present invention have realized following technique effect: owing to utilize the desired value of output pressure of respirator decompressor and the deviation between the actual value that output pressure is regulated, the output pressure that has solved existing respirator decompressor is fixed, the problem that can't regulate according to the duty of system, thereby can make the output pressure of respirator decompressor regulate within the specific limits, satisfy needs of different applications.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. the control method of the output pressure of a respirator decompressor is characterized in that, comprising:
Set the desired value of the output pressure of respirator decompressor;
With the difference of described desired value and the actual value of the described output pressure that records as the pressure divergence value;
Regulate described output pressure according to described pressure divergence value.
2. control method according to claim 1 is characterized in that, described desired value is to preestablish or set by the duty of analyzing described respirator.
3. control method according to claim 1 is characterized in that, regulates described output pressure according to described pressure divergence value and specifically comprises:
Whether the error of judging described pressure divergence value is in ± 2% scope;
If not, then regulating described output pressure is:
Figure F2009102356344C0000011
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K PBe proportionality coefficient, T IBe integration time constant, T DBe derivative time constant.
4. control method according to claim 1 is characterized in that, described output pressure is 20KPa～250KPa.
5. the adjusting device of the output pressure of a respirator decompressor is characterized in that, comprising:
Setting module is used to set the desired value of the output pressure of respirator decompressor;
Computing module is used for difference with described desired value and the actual value of the described output pressure that records as the pressure divergence value;
Adjustment module is used for regulating described output pressure according to described pressure divergence value.
6. adjusting device according to claim 5 is characterized in that, described desired value is to preestablish or set by the duty of analyzing described respirator.
7. adjusting device according to claim 5 is characterized in that, described adjustment module is regulated described output pressure according to described pressure divergence value and specifically comprised:
Whether the error of judging described pressure divergence value is in ± 2% scope;
If not, then regulating described output pressure is:
Figure F2009102356344C0000021
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K PBe proportionality coefficient, T IBe integration time constant, T DBe derivative time constant.
8. adjusting device according to claim 5 is characterized in that, described output pressure is 20KPa～250KPa.
CN 200910235634 2009-09-30 2009-09-30 Method and device for regulating output pressure of respirator decompressor Active CN102028996B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200910235634 CN102028996B (en) 2009-09-30 2009-09-30 Method and device for regulating output pressure of respirator decompressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200910235634 CN102028996B (en) 2009-09-30 2009-09-30 Method and device for regulating output pressure of respirator decompressor

Publications (2)

Publication Number Publication Date
CN102028996A true CN102028996A (en) 2011-04-27
CN102028996B CN102028996B (en) 2012-09-05

Family

ID=43882801

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200910235634 Active CN102028996B (en) 2009-09-30 2009-09-30 Method and device for regulating output pressure of respirator decompressor

Country Status (1)

Country Link
CN (1) CN102028996B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103071214A (en) * 2011-10-25 2013-05-01 北京航天长峰股份有限公司 Method for controlling respirator output oxygen concentration
CN103920214A (en) * 2014-04-28 2014-07-16 深圳市帝迈生物技术有限公司 Breathing machine and breathing pressure regulating control system and regulating control method thereof
CN104615170A (en) * 2014-12-30 2015-05-13 河南西瑞医疗电子技术有限公司 Accurate pneumatic control method for voice coil motor
CN105944197A (en) * 2016-05-16 2016-09-21 湖南明康中锦医疗科技发展有限公司 Open-loop control method and system of fan of breathing machine
CN109621114A (en) * 2018-12-17 2019-04-16 湖南城市学院 A kind of mechanical ventilation mode, pressure control method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH568756A5 (en) * 1973-09-07 1975-11-14 Hoffmann La Roche
SE9903467D0 (en) * 1999-09-24 1999-09-24 Siemens Elema Ab Feedback control of mechanical breathing aid gas flow
AU2008203812B2 (en) * 2007-08-17 2014-10-02 ResMed Pty Ltd Methods and Apparatus for Pressure Therapy in the Treatment of Sleep Disordered Breathing
CN201088762Y (en) * 2007-10-24 2008-07-23 诸宝荣 Digital oxygen flow quantity pulse-controller
CN101468223B (en) * 2007-12-29 2012-04-11 北京谊安医疗系统股份有限公司 Method for improving working accuracy of PEEP valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103071214A (en) * 2011-10-25 2013-05-01 北京航天长峰股份有限公司 Method for controlling respirator output oxygen concentration
CN103920214A (en) * 2014-04-28 2014-07-16 深圳市帝迈生物技术有限公司 Breathing machine and breathing pressure regulating control system and regulating control method thereof
CN104615170A (en) * 2014-12-30 2015-05-13 河南西瑞医疗电子技术有限公司 Accurate pneumatic control method for voice coil motor
CN105944197A (en) * 2016-05-16 2016-09-21 湖南明康中锦医疗科技发展有限公司 Open-loop control method and system of fan of breathing machine
CN105944197B (en) * 2016-05-16 2018-09-14 湖南明康中锦医疗科技发展有限公司 The open-loop control method and system of lung ventilator wind turbine
CN109621114A (en) * 2018-12-17 2019-04-16 湖南城市学院 A kind of mechanical ventilation mode, pressure control method

Also Published As

Publication number Publication date
CN102028996B (en) 2012-09-05

Similar Documents

Publication Publication Date Title
CN102028996B (en) Method and device for regulating output pressure of respirator decompressor
AU2005289817B9 (en) Gas flow control method in a blower based ventilation system
US9155852B2 (en) System and method for adaptive high frequency flow interrupter control in a patient respiratory ventilator
Sergi et al. Design and characterization of a compact rotary series elastic actuator for knee assistance during overground walking
EP0671181B1 (en) Medical ventilator
US4838257A (en) Ventilator
EP1796767B1 (en) Apparatus and method for driving a sensor in a ventilator
CN103028170B (en) A kind of respiratory pressure fuzzy control type respirator and respiratory pressure fuzzy control method
US9989974B2 (en) Method and apparatus of mass flow controlling for use in integrated gas delivery system
US20070006924A1 (en) Servo-controlled pneumatic pressure oscillator for respiratory impedance measurements and high-frequency ventilation
WO2005051280A3 (en) Method and apparatus for controlling a ventilator
CN102114291B (en) Control mechanism and method of tidal volume
US20180307254A1 (en) Methods and systems for controlling gas flow using a proportional flow valve
CN101468223A (en) Method for improving working accuracy of PEEP valve
CN102397608B (en) Method for controlling pressure of anesthesia machine and breathing machine in suction valve and expiration valve cooperative control mode
US9092038B2 (en) Variable flow rate analog output pneumatic (AOP) transducer
CN114370521B (en) Hysteresis compensation control method and system for electric proportional overflow valve
JPH07246240A (en) Medical ventilating device
CN112190801A (en) Oxygen flow control system and method of respiratory support equipment
Misgeld et al. Decentralised control of an electro-pneumatic adjustable impedance actuator
CN113485092B (en) Pressure stabilizing cavity control method and system based on double-valve regulation
CN105031788A (en) Breathing machine voltage regulating system and control method
Sheltag et al. Enhancing Artificial Ventilator Systems: A Comparative Analysis of Traditional and Nonlinear PID Controllers.
EP2281593A1 (en) Medical blower control via pneumatic patient model
CN116212178A (en) Noninvasive ventilator oxygen concentration control method, oxygen concentration control system and related equipment

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant